Electromechanical telautograph.



J. B. RAWLINGS. ELECTROMECHAN!CAL TELAUTOGRAPH.

APPLICATION FILED MAY 12, 1916- Patented Feb.13,1912.

4 SHEETS-SHEET 1.

Kigali J. B. RAWUNGS.

ELECTROMECHANICAL TELAUTOGRAPH.

APPLICATION FILED MAY 12, I916. L21 5,85%: Patented Feb.13,1917.

4 SHEETS-SHEET 2- Whwse J. B. RAWL INGS. ELECTROMECHANICAL TELAUTOGRAPH.

APPLICATION FILED MAYIZ, I916.

. Patented Feb. 13, 1917. I

4 SHEETS-SHEET 3.

m gja J. B. RAWLINGS.

ELECTROM'ECHANICAL TELAUTOGRAPH.

APPLICATION FILED MAY I2, 1916.

1,215,852 Patented Feb. 13, 1917.

4 SHEETS-SHEET 4.

40 4 7 Wflnasaes JOE B. BAWLINGE, 0F MEMPHIS, TENNESSEE.

ELECTROMEGHANICAL TELAUTQGRAEH.

Specification of Letters EFatent. i gm ig yfigfi Application filedii'lay 12, 1916. Serial No. 97,022.

- specification.

This invention relates to electro-inechani cal telautographs.

My obyect is to provide a telautograph which Will operate mechanically and will be controlled electrically and adapted for substantially silent operation at small maintenance cost. 7

In my in; ntion I employ mechanical means, prefer bly pulleys or turn-tables and gearing, for shifting the marker or stylus of .the'receiving instrument in the up and 'down and lateral movements necessary to efiect writing, and in the sending machine these movements are effected manually by the use of the pencil or writing device which is grasped by the fingers of thesender. Each instrument is adapted for either receiving or sending purposes and the mechanical coordination of the operating devices of the respective telautographs is preferably accomplished by the use of cords, wires, or flexible connections provided with suitable tensioning devices, by which they are kept in that degree of tension or tautness which insures exact duplication of operation in the receiving machine to that of the sending machine.

The electrical control, in each instrument or machine consists of a signal, an electromagnetic device for causing the stylus of the receiving instrument to be drawn into contact with the paper web on which the writing is made, and a controlling switch,

by which signals may be transmitted from the sending to the receiving machine, and vice versa, at the beginning and cessation of the transmission of writing, and the electromagnetic means provided to cause the stylus of the receiving machine to engage the paper web.

In the simplest embodiment of my invention, each machine will embody complete means for writing, signaling, and the control of the writing means either manually or electro-magneticalLv according to whether t e machine is rcceiying or sending and, in hddition, improvements are provided for tensioning the cords that form the mechanical connection between the sending and re ceiving machines; novel devices are proided for shifting the writing element; other novel means for causing the writing element to lift from, or engage with, the paper; paper winding means for advancing the paper web; as well as details of construction of the different parts.

So far as i. am aware, however, l-am the first to provide combined self-contained me chanically operated and electrically con trolled writing means in a telautograph, and l do not limit myself to the details of construction which are hereinafter described and shown in the accompanying drawings that illustrate one embodiment of the invention.

In addition to its simplest embodiment in mechanically and electro-magnetically cooperating combined sending and receiving machines of a telautograph, my invention is adapted for use where there is a central or master machine and individual stations or secondary machines any one of which may communicate with the master machine and by which the operator at the master machine may selectively connect the master machine to any one of the secondary machines to the exclusion of cooperation with;

the other secondary machines, except in re spect to signaling. This embodiment of the invention, one example of which is set forth hereinafter and disclosed in the accompanying drawings, is adapted for use in those situations where information may be furnished from the operator at a central station or head-quarters, as for instance, the

cashier or credit man in any mercantile,

financial or other institution with whom substations or departments may communicate, one at a time. provide selective mechanical switching or coupling devices and an electrically operated signaling device or annunciator so that any department or station may signal a master machine and if that machine is not coupled to some other secondary machine,

the cashier or credit man at the master ma-,

chine may mechanically couple his machine to the signaling machine and atthesame time operate the electrical circuits connecting his machine to the secondary machine, so that con'ununication may be had between the particular selected secondary machine and the master machine to the exclusion of the other secondary machines without, however, deterring the remaining secondary machines In such an installation I from signaling the master machine and consequently necessitating no delay in commucouple his machine to the neXt secondary machine that has signaled him.

In the central station installation just set forth, there is provided a series of operating devices, coupling means, and pulleys, whereby the master machine may be selectively coupled to any given secondary machine. In addition, controlling electrical contacts and circuit connections for signaling, and magnet control purposes, are provided. bywhich the mechanical coupling of the master machine to the selected secondary machine will also electrically connect the said. machines to enable written intercommunication to be obtained without, however, cutting out the signaling circuits of all the remaining machines.

I am aware that my master machine and secondary machine installation in respect to both the mechanical selective cooperation and the electrical selective cooperation and signaling may be varied without departing from the essential principles represented by the illustrative embodiment of that part of the invention which ishereinafter set forth and shown in the accompanying drawings, and I do-not, therefore, limit myself to the details of construction shown and described in respect to that part of my invention.

In the accompanying drawings:

Figure 1 is a plan view, with the cover removed, of one of the secondary machines or what will constitute a primary machine in an ordinary two-station installation;

Fig. 2,'a front sectional elevation of the machine of Fig. 1;

Fig. 3, an end sectional elevationf Figs. 1- and 5, detail side elevations of the turn-table for the writing arm;

Fig. 6, a detail plan view of mental-y turn-table;

Fig. 7, a side elevation thereof;

Fig. 8, a. detail plan of one of the writing arms, with the pencil applied thereto;

Fig. 9, a side elevation thereof;

Fig. 10, a front elevation of the guide and contact plate;

Figs. 11 and 12, details of the cord tension devices;

Fig. 13, a diagram of the circuit connectionsfor a two-station installation;

Fig. 14, a detail side elevation, partly in section, showing the selective means for use on a master machine;

15, a rear elevation thereof; and

Fig. 16, a diagram of the circuit connections for a multi-station master machine apparatus. v

the supple- I Referring first to Figs. :1, 2 and 3, there is shown a combined sending and receiving.

with Figs. 1% to 16.

The operative parts of the telautograph are contained within the shell or case 1 which may contain, at any suitable point, any desired signaling device such as a buzzer 2 or electric light, or both. The writing arm 3, which is shown in detail in Figs. 8 and 9, is provided with a stylus or-pencil 4 held by a screw 5 so that it may be adjusted as desired. The writing arm 3 of the instrument is provided with aclip 6 for the application of a writing device 7 in the nature of a pencil whose ball head is engaged with the clip 6 in such manner that a ball and socket joint is provided. This device 7 may be detachable s that it will only be applied to a writing arm when the machine 1s used for sendmg purposes, as it 18 not necessary on the writing. arm of the ma chine which at the time is used to receive the message.

The stylus 4 is adapted to cooperate with the paper-web 9 which runs from the roll 10 that is suitably detachably mounted at 11, on topof the table or bed 12, around the idlers l3 and 14: to the take-up reel or drum 15 which, also, is suitably detaehably mounted in the standard 16 and is adapted to be turned by a crank 17 on an upright shaft 18 which is connected by gearing 19 to the reel 15. .The cover 20 may be opened out for use as an arm rest or slid closed in suitable guides- 21.

The writing arm 3 is rotatable with, and slidably mounted on, a mainturn-table 22 (Figs. land 5) which has a pulley portion 23 and is composed of halves connected together by plates 24. and screws 25. The turn-table is loose on a shaft 26 which carries a pinion 27 in mesh with the teeth or rack 28 of the writing arm 3. Rotation imparted to the shaft 26 causes reciprocation of the Writing arm 3 to form the up and down strokes of the Writing effected by the pencil or stylus 4. Such rotation of the shaft 26 is effected by a supplemental turntable 29 (Figs; 6 and 7) which has gear teeth 30 and apull'ey 31. The teeth 30 mesh with a pinion 32 carried by. the shaft 26. i

The main turn-table 22 is provided wit upright antifriction roller which the parallel sides of the Writing arm 3 hear so that the friction due to reciprocation of the writing arm 3 is minimized and the writing'arm is also coupled to the turnguides 33 against,

table 22 so that it will swing with ilz, as well as being" free to reciprocate 1n rcleiion choreto. Rising from'the central portion oi the :lurn-seble 22 is a yoke or bracket which rollers 36 and is disposed between hem and.v

the crossniece of the yoke l; Friction is minimize(lby this arrangementancl the writing arm is thus mounted so that it is free to tilt slightly to enable the forward end which carries the sfiylus l to rise and fell, the bracket keeping" the arm 3 in place. The rack 28 is relatively thin so illmil its leech wi l not interiors with this illjing motion ancl'wili always remain inengagement with ihe teeth of the sctucein pinion 27. v

The forward end of che writing arm 3 projects through an elongated slot 3'? of El guide and contact plate 38 (Figs. 1, i, 8 and 10) which is mounted in suitable guides 39 for up and clown movementuntl rests upon metal spring contact members 40 which are edaptecl to cooperate with other electric contools 41. The resiliency of the spring; contact members 40 holds them, with the contact plate and guide 38, in normal elevated position out of Contact with the plates ll and, by reason of the location of the writing arm in the guide slo 37, the writing arm is normally helzl 1n slightly reiseo position,

3t? free of the paper web 9.

An electro-inagnelz 42 is arranged. to cooperate with the pole piece 43 of the contact member 38 and when the magnet is once gized, the z tl'raction of the pole causes the concoct 'plate 38 to clescencl and to bring the contacts 10 and ll togeliher. for completion of the electric circuits and cause the stylus l to bear upon the paper web 9.

Referring to Figs. 1 and 13, the circuit connections between the signelino device 2, the contacts 40 curl 41 and the poinis lel, l5 and 46 of the switch l? are so arrange in relation to the threewire intercomniunicaeing circuits 48, l?) and 50 that control may be obtained as will presently he (lescribecl.

suitable point there are mounted in a. suitable bracket 51 on the vertical miles 52 and 53, the pulleys 04cm the one instance, and 56 and in the other instance. Cords, wires, or other suitable flexible connections 58 for the pulls 23 of the turn-table 22, and 59 fol the pulley 31 of the supplemental turn-' nhlo29, respectively have their Shl'HKlS engaged with, the pulleys 54, and 57, she two sets of cords extendin direct or over suitable sheaves or pulleys. from lhc mo.- chinc of one station to the machine of enothcr section. Means are provided adapcecl to keep the respective cords 58 and 59 suitablytout so that there will be no slippage or lack of exactitucle of coordination 06 tween the turn tables 22 and 29 of one machine with corresponding turntables of the;

other machine. Such tension means may be of the construction. shown in Figs. 3, 11 and 12, comprising the respective upwardly exeenoling brackets 60, carrying the pulleys 62 for the respective cords 58 and 59, these cords or wires running around the adjust able pulleys M which are ccrrieil by runners G5 on the brackets (50 and held in any suitable position affording lhe desired tension to the cords by screws 66. These tension devices maybe conveniently located in the machines themselves or exterior thereto, as preikm'ecl, and other means might be substitus-cl for the purpose. The cord 58 is secured to pulley E22) by one of the pletes 2-4 fastening's The cord or cords 59 are secured to the policy 31 by the screws 67 and 68, Fig. 6.

Referring to 1 and 13, the operation is as follows: The callingoperator at the machine A first moves the switch 47 from contact 46 onto the contact point l5, thereby sending current from the cattery 87 into the signal of the other machine B. If the swilch 4? oi? the machine-B is not on the contact 4C6, the operator at the machine B places it on that contact, thereby conditioning; his machine so the? the elcctro-magnefi 42 will he in the circuit l9-50, but he first connects switch l7 to contactpoint l5 he give an answering signal hack to the buzzer or light 2 oi the sending machine A. The

operator at A, having received the return signal, immediately places his switch 4:? on the contact point 44: so that when the sending operator at orasps the pencil 7 and presses the stylus or 'pencil l down on the paper of his machine, he thereby depresses lhc contact plate 38 and closes the contacts 40, l, which completes the circuit from battery 8? ihrough 50, switch 47, contacts 40, ll, circuitv 49, magnet 42 of machine B and back through contact point 46, switch l7 and circuit 50 to the battery 87. As long, therefore, as ihe sending operaior at machine A writes on the paper, the electroonegnet L2 at the machine B remains energized and pulls clown the writing arm 3, thereby holding" the stylus or pencil 4 of the receiving machine 13 on. the paper web. The cord or wire connections 58 and 59 cause mow'ements of the writing arm 3 of the receiving machine ll corresponding to the manual movements imported lo the writing arm B of the in machine Ah the manipulation of the pencil When the message is finished, the operators place their switches -17 on the contact points 46 so that either operator may signal the Gilllfil and either may then colnmunitral or master machine and individual stations or secondary machines, as hereinafter set forth, the operation of any given secondary machine in signaling and communicating with the master machine is substantially the same as set forth, except that selective mechanism is provided at the master machine, whereby operative connections between a secondary machine and the master machine cannot be had until the operator at the master machine couples the mechanical connections of his machine with the secondary machine, although any secondary machine may signal. the master machine at any time. l

Referring to Figs. 14 to 16, I have shown a master machine provided with signals and selectively operable means whereby any secondary machine may be mechanically coupled thereto so that the master machine and the secondary machine to which it is coupled at the time constitute a two-station installation, as it were, wherein the signaling and writing may be carried on substantially as described in connection with Fig. 13.

Located conveniently to, or attached to, the shell or case 1 is a frame 69 in which are mounted two rotary shafts 70 and 71. To the lower portions of these shafts there are fixed pulleys or sheaves72 and 73, to which are directly connected, with interposed tension means if desired, the pulleys 23 and 31 by cords or wires 58 and 59, and consequently; each movement of the pulleys 23 and 31 is communicated to the pulleys 7 2 and 73and through them, to the respective shafts 70 and 71. The shaft-s 70, 71 are pro vided with alternating, round and square portions 74 and 75. Normally, loosely mounted on the round portion 74 of the respective shafts 70, 71, are pairs of sheaves 76, 77, 78 79 which have square holes 80 therein adapted to fit the square portions 75 so that when these sets of sheaves or pulleys are slippedonto the square portion 75, they will turn with the shafts 7 O, 71.

Pivoted at 81 to the sides of the frame 69 are lever frames 82, 83, 84, 85, which may be independently operated to elevate or lower any given pair of sheaves 76, 77, 78,

79. Consequently, any set of the sheaves may be coupled to the shafts 70, 71 and oppled tothat particular pair of sheaves. The

respective machines C, D, E of the diagram,v Fig. 16, are of the construction of the ma-' erat'ed by the master machine, or cause operation of the master machine by the secondary machine which is mechanically couchine of Figs. 1 to 12 and have their cords or wires 58, 59 respectively running to the sets of pulleys or sheaves 76, 77, etc., according to the number of machines employed. Therefore, whichever set of sheaves 76, 77, etc., is at the time coupled to the shafts 70, 71, the particularsecondary machine C, D, etc., is, in effect, coupled up as'a two-station installation with the master machine M, Fig. 16, to the exclusion of the remaining secondary machines, except that any secondary machine may signal. to the master machine at anytime, as Will now be set forth.

Attached to the frame 69 is-a metal plate 86 which forms a common return for the battery wire 87, Fig. 15, and into which are screwed electric lamps 88, 89, 90 and 91. To engage the center poles or terminals of the respective lamps, I provide metal contact strips 9:2, 93, 94, 95, which are insulated from each other and are respectively connected to the signal circuits 96, 97, 98.

The extra pair of pulleys 7 9, signal 91 and lever 85 are shown, except in the diagram, Fig. 16, to illustrate how many additional secondary machines may be added asmay be desired.

It will be seen, therefore, that the operator at any ofthe secondary machines C, D, E, may signal to a master machine by placing the switch 47 on the contact point 45, which will thus illuminate the electric lamp at the master machine and, as will presently appear, the operator at the master machine may signal back to the operator at any secondary machine afterdepressing the given lever 82, 83, etc., which controls communication with the secondary machine.

Mounted. on the frame 69 are normally open contacts arranged in pairs 99, 100, 101, and at 102, 103, 104, etc.,which arepositioned to be closed when the given levers 82, 83, etc., are depressed. For instance, when the lever 82 is depressed, the contacts99 are pressed together and contacts 102 are also closed. For instance, when the lever 82 is depressed, the contacts 99 connect the signal circuits 48 of the master machine M and the secondary machine C and the same movement of the lever 82 connects, through the contacts-102, the magnet circuits 49 of the master machine M and the secondary machine 0. In like.

manner, operation of lever 83 connects the signal and magnet circuits of the master machine and secondary machine D. The battery circuit 87 is always in readiness fo use.

The switch-boards of Fig. 16 maybe either connected up as a part of the frame 69 or levers corresponding to the levers 82, 83, etc, may be employed and a separate switch-board used.

When any one of the secondary machines wishes to communicate with the master machine M, the switch 47 is placed on the contact point 45, thereby lighting the lamp at the switchboard of the master machine corresponding to the secondary machine which is signaling. If the master machine is idle, the operator at that machine will then operis signaling and will give the return signal as previously described.

' Operating the lever 82 couples the pulley 7 6 to the square portion 75 so that the master machine M and the secondary machine C are then mechanically coupled together and writing may be permitted back and forth as previously described. Should the master machine be in use when the signal comes in from the machine G, as soon as communication with the other secondary machine D, E, etc, is finished, the lever 83 or 84 which has previously been down, will be raised and the lever 82 depressed. Should the occasion arise, all of the levers may be depressed so that the master machine may communicate with all of the secondary machines C, D, and E simultaneously.

It will be seen, therefore, that there is a selective control at the master machine of the mechanical cooperation with the master etc machine of any secondary machine and that any secondary machine may signal the master machine at any time, Whether the latter I is coupled to another secondary machine .or

not.

In each machine, the writing is made on the left-hand section of the paper web (Fig. 1), the right-hand section exposing to view, the previous writing. If there is not enough space remaining on the left-hand portion of the web to answer a question previously written on that. portion, the handle 17 may be turned to draw the paper toward the right so as to expose a clean portion to be written on by the pencil 4 in makinganswer.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a telautograph, duplicate machines, each adapted toserve as a transmitter or re ceiver, and each comprising the combination with a writing member, of electromagnetic means for causing it to cooperate with the surfaceto be written upon, and mechanical means for shifting said writing member to efiectwriting, and mechanical connections between the writing members of the respective machines whereby they move in unison.

2. In a telautograph, duplicate machines, each adapted to serve as a transmitteror receiver, and each comprising the combine tion with a Writing member, of electrical contacts operated therebywhen said writing member is moved into or out of engagement with the surface to be written upon, electromagnetic means for causing said writing member to coiiperate with the surface to be written upon, ci'cuits including the contacts and electro-magnets, mechanical means for shifting said writing member to effect writ ing, and mechanical connections bet 'eenthe writing, members 01" the respective machines whereby they move in unison.

'3. In a telautograph, duplicate machines,

each adapted to serve'as a transmitter or receiver, and each comprising thecombinatron with a writing member, of electrical contacts operated thereby when said writing member is moved into or out of engagement with the surface to be written upon, and

electromagnetic means for causing said with a writing member movable in any (lin rection, of electrical contacts, a movable contact plate with which the writing member has a loose relative sliding engagement when moved in one direction and which positively moves the plate and causes it to cooperate with said contacts when said writing meniber is moved into engagement with the surface to be written upon, and means for shifting' the writing member to eil'ect writing.

5. In a telautograph, the combination with a writing member movable in any direction, of electrical contacts, a movable contact plate with which the writing member has a loose relative sliding engagement when moved in one direction and which positively moves the plate and causes it to cooperate with said contacts when said writing member is moved into engagement with the surface to be written upon,'1neans for shifting the writing member to effect writing, and

electromagnetic means for holding the said writing member in engagement with the surface to be written upon, to thereby hold the plate depressed and the contacts engaged.

(3. In a telautograph, the combination with a writing member, of a main turntable which carries said writing member and is adapted to swing thc'lattcr, a supplemental turn-table, and an operative connection between the supplemental turn-table and writing member adapted to shift the latter in relation to the main turn-tabie.

7. In a tel autograph, the combination with a writing member, of a main turn-table which carries said writing member and is adapted to swing the latter, a supplemental turn-table, independent cords. or other flEXi ble 'connections i'or turning the respective turn-tables, and a rack and pinion connection between the writing member and the supplementai turn-table.

8. in a telautograph, the combination with a turn-table, of a writing arm'carried there-.

- with a turn-table, of a writing member carried thereby adapted to swing therewith and mounted to tilt, and electromagnetic means for tilting said writing member to cause the writing element to contact with the surface to be written upon.

11. In a telautograph, the combination with a turn-table, of a writing member slidably and tiltably carried thereby whereby it may swing with, and move crosswise of,

said turn-table, and tilt in relation thereto,

and electro-magnetic means adapted to tilt the writing member when in any given position.

12. In a telautograph, the combination 7 with a turn-table, of a writing member slidably and tiltably carried thereby whereby it may swing with, and move crosswise of, said turn-table, and tilt in relation thereto, a plate adapted to guide and cooperate with said Writing member, an armature carried by the plate, and an electro-magnet adapted to attract said armature.

13. In a telautograph, the combination with a turn-table, of a writing arm carried thereby arranged to swing therewith and mounted to tilt in relation thereto, a supplemental turn-table for shifting thewriting member crosswise in relation to the main turn-table, and means for operating the respective turn-tables.

14. Ina telautograph, the combination with a turn-table, of a'writing arm carried thereby arranged to swing therewith and mounted to tilt in relation thereto, a supplemental turn-table for shiftingthe writing member crosswise in relation to the main turn-table, means for operating the respective turn-tables, and electro-magnetic means for tilting the writing member to cause the writing element to contact with the surface to be written upon.

15. A telautograph comprising a pinrality of duplicate instruments each adapted to serve as a transmitter or receiver and having a writing member, mechanical means for directing the movements of said' writing member, and electro-magnetic means for disposing the writing member in writing position, mechanical connections between, the

mechanical means aforesaid of the respective instruments, and electrical connections between eleotro-magnetic means of the respective instruments.

16. A telautograph comprising a plurality of instruments, and combined electrical and mechanical operative connections between said instruments, whereby they are adapted for conjoint action and each instrument may be used either asa transmitter or a receiver. 17. A telautograph comprising a plurality of duplicate instruments each adapted to serve as a transmitter or receiver, and cord or other flexible operative connections between the Writing devices of the respective instruments, adapting them for conjoint action.

18. A telautograph comprising a plurality of instruments, and cord or other flexible operative connections between the writing devices of the respective instruments, adapting them for conjoint action, and means at, and electrical connections between, said instruments adapted for causing the writing' devices to produce writing.

19QA telautograph comprising a plurality of instruments each comprising a writing member, main and supplemental turn-tables, one for swinging the writing member and the'other for shifting it, and independent cords or other flexible connections between corresponding turn-tables of the respective machines, whereby each instrument constitutes a combined transmitter and receiver.

20. A telautograph comprising a plurality of duplicate instruments each having to perform writing.

A telautograph comprising a plurahty of instruments each having a writing inc member, means for causing the members to perform corresponding movements, each writing member being adapted for use either as a transmitter or receiver, electromagnetic means for the respective instruments adapted to position the writing membar to perform writing, electrical connectionsbetween the electro-ma netic means of the respective instruments, and devices cooperating with the respective writing mem: bers adapted for controlling the electrical connections aforesaid.

23. In a telautograph, the combination. with a plurality of secondary instruments and a master instrument, each having a writing member adapted for use either as a transmitter or a receiver, of operative connections between said master instrument and the respective secondary instruments, ,and selective means for coupling the master instrument to any secondary instrument to the exclusion of the other secondary instruments.

24. In a telautograph, the combination.

with a plurality of secondary instruments and a master instrument, each having a, writing member adapted for use either as a transmitter or a receiver, ofmechanical nuances connections whereby the master instrument may he coupled to any secondary instrument, and selective means for coupling one or more of the secondary instruments to the master instrument tothe exclusion of the nections between said master instrument the respective secondary instruments, selective means for coupling the master instrument to any secondary instrument to the exclusion of the other secondary instruments, and signaling means connecting secondary instruments to the master instrument which are operable at all times,

26. In a telautograph, the combination with a plurality oi? secondary instruments and a master instrument, of operative mechanical connections between the master instrument and the secondary instruments, means for selectively mechanically coupling the master instrument to any secondary instrument to the exclusion of the remaining secondary instruments.

27. In a telautograph, the combination with a plurality of secondary in truments and a master instrument, of operative inechanical connections between the master instrument and the secondary instruments, means for selectively mechanically coupling the master instrument to any secondary instrument to the exclusion of the remaining secondary instruments, and signaling means whereby any secondary instrument may signal the master instrument at any time.

28. in a telautograph, the combination with a plurality-of secondary instruments, of a, master instrument, operative mocha cal, connections between the respect secondary instruments and the master instrument, whereby writing may he efiected,

electric signaling means i'or the respective instruments, electrical connections for said signaling means, and selective means jointly controlling the signaling connections and the mechanical connections he tween the master instrument and the respective .secondar instruments, whereby any secondary instrument may be selected for communication with the instrif ment.

29. in a telautograph, the combination with a plurality of secondary instruments, of a master instrument, each having a writing member, mechanical means for operatively connecting the writing member any secondary instrument with the writing member of the master instrument, electromagnetic means for positioning the writing members of the respective instruments so that they w ll. effect Writing, electrical conneetions between the said eiectro-magnetic means, electric signaling means for the respective instruments, electrical connections for said signaling means, and selective means for jointly controlling the operative mechanical connection, the electrical signah ing connection and the electrical connections for'the electromagnetic means oi 'eny secondary instrument and the master machine.

3-0, in a mechanically operated telautograph, a selective-mechanical coupler comprising a rotary member adapted to constitute intermediate mechanical connection between the instruments constituting the telautographs, and a plurality oi independently operable rotary mechanical devices for connection to respective telautograph instruments, and means for coupling any desired one or more of said mechanical devices to said rotary member to thereby select the tel-autograph instruments which are to communicate with each other.

in mechanically operated telautograph, a selective mechanical coupler comprising a rotary member adapted to consti' tote an intermediate mechanical connection between the instruments constitutingthe tel-autographs, aplurality of independentlyoperable rotary mechanical devices adapted for connection to respective telautograph instruments, means for coupling any desired one or more of said mechanical devices to said rotary member thereby select the telautograph instruments which are to communicate with each other, and electrical co tact devices adapted to centrol the electrical connections between therespective telautograph instruments which are adapted to cooperate with the respective means for U shifting the mechanical devices aforesaid to thereby exercise a joint control over the mechanical devices and electrical contact devices fer the respective instruinents= In a mechanically onerateci teleutograph, a selective mechanical. coupler com c) v, orising a ry shalt operatively connected t '0 one of the telautograph instruments, a 1 lurality of wheels normally disconnected from said shaft, means being provided whereby the respective wheels may be me chanically coupled to the shaft, independent shifting devices for independently CO11' pling the respective wheels to the shaft, and electrical contact devices adapted for operaties by the respective shifting devices to its respectively control electrical communlcation between the telautograph instruments represented by the wheels and contact devices aforesaid.

34:. In a telautograph, the combination with telautograph instruments each having a writing member, of independent rotary mechanical devices adapted for imparting independent movements to the writing memher in each telautograph, and a selective device whereby one of the telautograpns may be mechanically coupled to any one of the other telautograph instruments com- 'prising a pair of rotary shafts respectively mechanically coupled to the respective rotary devices of the master telautograph instrument, sets of wheels normally disconnected from the respective shafts and respectively mechanically connected to the secondary telautographs, and means for selectively coupling one or more of the pairs of wheels to the pair of shafts to thereby mechanically connect a secondary telautograph to the master telautograph, whereby one may be mechanically operated from the other.

In a telautograph, the combination with t elautograph instruments each having a writing member, of independent rotary mechanical devices adapted for imparting independent movements to the writing memher in each telautograph, and a select1vedevice whereby one of the telautographs may be mechanically coupled to any one of the other telautograph instruments comprising a pair of rotary shafts respectively mechanically coupled to the respective rotary de-- vices of the master telantograph instrument, sets of wheels normally disconnected from the respective shafts and respectively mechanically connected to the secondary telautographs, means for selectively coupling one or more of the pairs of wheels to the pair of shafts to thereby mechanically connect a secondary telautograph to the master telautograph, whereby one may be mechanically operated from the other, electro-magnetic means for the respective telautographs adapted to position the Writing members thereof to effect writing when mechanically operated, electrical connections betweenthe electro-magnetic means of the telautographs, and contact devices controlling the aforesaid electrical" connections which are respectively controlled by the means for shifting the respective sets of wheels aforesaid.

In testimony whereof, I hereunto afiix my JOE B. RAWLIN GS.

signature. 

